gcp_project_id = attribute(:gcp_project_id, default: '<%= external_attribute(pwd, 'gcp_project_id') -%>', description: 'The GCP project identifier.')
gcp_kube_cluster_name = attribute(:gcp_kube_cluster_name, default: '<%= external_attribute(pwd, 'gcp_kube_cluster_name') -%>', description: 'GCP container cluster name')
gcp_kube_cluster_zone = attribute(:gcp_kube_cluster_zone, default: '<%= external_attribute(pwd, 'gcp_kube_cluster_zone') -%>', description: 'GCP container cluster zone')
gcp_kube_cluster_size = attribute(:gcp_kube_cluster_size, default: '<%= external_attribute(pwd, 'gcp_kube_cluster_size') -%>', description: 'GCP container cluster size')
gcp_kube_cluster_zone_extra1 = attribute(:gcp_kube_cluster_zone_extra1, default: '<%= external_attribute(pwd, 'gcp_kube_cluster_zone_extra1') -%>', description: 'First extra zone for the cluster')
gcp_kube_cluster_zone_extra2 = attribute(:gcp_kube_cluster_zone_extra2, default: '<%= external_attribute(pwd, 'gcp_kube_cluster_zone_extra2') -%>', description: 'Second extra zone for the cluster')
gcp_kube_cluster_master_user = attribute(:gcp_kube_cluster_master_user, default: '<%= external_attribute(pwd, 'gcp_kube_cluster_master_user') -%>', description: 'GCP container cluster admin username')